So, I'd been putting off getting the forum updated to the latest version of phpBB, as the automated process is not quite as automated as I would hope. But I just bit my lip and did it. Let's never speak of this again.

I deleted the theme we were using. It's totally broken, and was filled with spammy links to some dude's russian gaming site. If there's sufficient outrage, I'll look into grabbing a new theme and installing it. Feel free to go peruse available themes(called "styles" in phpbb) and link any here that you might like.